ATI Radeon HD 3870 AGP vs ATI Radeon HD 4870 X2

VS

ATI Radeon HD 3870 AGP

ATI Radeon HD 4870 X2

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 3870 AGP and 1024MB VRAM Radeon HD 4870 X2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Radeon HD 3870 AGP 's Advantages

Lower TDP (106W vs 286W)

ATI Radeon HD 4870 X2 's Advantages

More VRAM (1024GB vs 512GB)

Larger VRAM bandwidth (115.2GB/s vs 72.06GB/s)

480 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 3870 AGP

0.497 TFLOPS

Radeon HD 4870 X2 +141%

1.2 TFLOPS

Radeon HD 3870 AGP

VS

Radeon HD 4870 X2

Graphics Card

Unknown

Release Date

Aug 2008

Radeon R600

Generation

Radeon R700

Desktop

Type

Desktop

AGP 8x

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1126 MHz

Memory Clock

900 MHz

Memory

512MB

Memory Size

1024MB

GDDR4

Memory Type

GDDR5

256bit

Memory Bus

256bit

72.06GB/s

Bandwidth

115.2GB/s

Render Config

4

Compute Units

10

-

320

Shading Units

800

16

TMUs

40

16

ROPs

16

-

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

256 KB

-

Theoretical Performance

12.43 GPixel/s

Pixel Rate

12.00 GPixel/s

12.43 GTexel/s

Texture Rate

30.00 GTexel/s

-

497.3 GFLOPS

FP32 (float)

1200 GFLOPS

99.46 GFLOPS

FP64 (double)

240.0 GFLOPS

Board Design

106W

TDP

286W

300 W

Suggested PSU

600 W

2x DVI 1x S-Video

Outputs

2x DVI 1x S-Video

1x 8-pin

Power Connectors

1x 6-pin + 1x 8-pin

Graphics Processor

RV670

GPU Name

R700

RV670 XT (215-0708005)

GPU Variant

R700 XT (215-0669045)

TeraScale

Architecture

TeraScale

TSMC

Foundry

TSMC

55 nm

Process Size

55 nm

0.666 billion

Transistors

0.956 billion

192 mm²

Die Size

256 mm²

Graphics Features

10.1 (10_1)

DirectX

10.1 (10_1)

3.3 (full) 4.0 (partial)

OpenGL

3.3

N/A

OpenCL

1.1

N/A

Vulkan

N/A

-

4.1

Shader Model

4.1

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